Knut tiiure rennerfelt



(No Model.)

' K. T RENNERFELT.

HORSESHOE WITH DBTAOJIABLB GAL'KS. No. 556,278 Patented-Mar. 10, 1896.

i i i WITNESSES: I v INVENTOR' A TTOHNE Y.

UNITED STATES PATENT QFFICE.

KNUT THURE RENNERFELT, OF UHRFORS, SWVEDEN.

HORSESHOE WITH DETACHABLE CALKS.

SPECIFICATION forming part of Letters Patent No. 556,278, dated March 10, 1896. Application filed May 10, 1895. Serial No. 548,806. (No model.) Patented in Sweden April 21, 1894,1To. 5,502.

To all whom it may concern.-

Be it known that I, KNUT THURE RENNER- FELT, a subject of the King of Sweden and Norway, and a resident of Uhrfors, Ashammar, Sweden, have invented certain new and useful Improvements in Detachable Oalks for Horseshoes, (for which I have obtained Letters Patent in Sweden, dated April 21, 1894, No. 5,502,) of which the following is a specification.

My invention consists of an improved arrangement of screw-fastenings for securing detachable calks in horseshoes, as hereinafter described,reference beingmade to the accompanying drawings, in which Figure 1 is a plan View of a horseshoe havin g detachable calks secured according to my invention. line w as, Fig. 1. Fig. 3 is a section on line F G, Fig. 1. Fig. 4 is a section on line H J, Fig. 1; and Fig. 5 is a section on line K L of Fig. 1.

A and B represent calks of different forms having a taper shank E to be inserted in taper holes in the body of the shoe S, said shanks being preferably of rectangular form in crosssection and the calks being formed with a shoulder a on one or more sides at the junction of the tang with the body, and 011 one of the sides a lateral recess, as D, is formed, partly in the body of the calk and partly in the tang.

Near one side of the hole in the body of the shoe for the tang of a calk, and corresponding with the side of the calk having the lateral recess D, a screw-tapped hole is made parallel with the shank of the calk for reception of a headed screw 0 for securing the calk, said hole being countersunk, as at b, for the head of the screw. Care is taken that the bottom of the countersink and the inner shoulder of the recess D shall coincide when the shoulder or shoulders a of the calk set home in the shoe bear against the surface'of the body of the shoe. The hole for the screw is in such close proximity to the hole for the tang that the countersink 1) reaches into the hole for the tang to the extent of the depth of the recess D in the side of the calk, or thereabout, so that the head of the screw. reaches into the recess, and when firmly screwed against the bottom of the countersink, so as Fig. 2 is a transverse section onto be secured itself, also looks the calk in position.

To enable the calk to be detached without removing the screw, a part may be cut off the head of the screw at one side, as shown at e, or the head of the screw may be eccentric to the rest, so that by turning the flat or short side of the head to the recess D the shank of the calk will be released. This mode of securing the calks is adapted for securing two calks with one screw, as may be desirable in the employment of two separate calks at the toe of the shoe, as represented in the drawings, the screw being located between them, as shown. This arrangement of a pair of separate calks at the toe is favorable in the matter of the construction of the calks, in that two calks of the same size and make as the heel-calks serve as well or better in some respects as the usual wider toe-calks which involve separate construction.

I claim 1. The improvementin devices for securing detachable horseshoe-calks, which consists in the calk having the lateral recess in the side, and the shoe having the headed fasteningscrew tapped in the body parallel with the shank of the calk, and in the relation to the calk and to the body of the shoe whereby the head of the screw engages the recess in the calk when screwed into the body and also binds against the body for locking the screw and thereby locks the calk in the shoe, substantially as described.

2. The improvementin devices fol-securing detachable horseshoe-calks, which consists in the calk having the lateral recess in the side, and the shoe having the headed fasteningscrew tapped and countersunk in the body parallel with the shank of the calk and in the relation to the calk whereby the head of the screw engages the recess in the calk, and when screwed home in the countersink also bears 011 the inner shoulder of the recess in the calk, and binds on the bottom of the countersink, and locks the calk in the body of the shoe, substantially as described.

3. The improvement in devices for securing detachable horseshoe-calks, which consists in the calk having the lateral recess in the side, and the shoe having the headed fasteningscrew tapped and countersunk in the body in the relation whereby its head engages in the recesses of both the calks and secures them in the body of the shoe, said head having a short side adapted to release the ealks, substantially as described.

Signed at Uhrfors, Ashammar, Kingdom of Sweden, this 24th day of February, A. D. 1805.

KNUT THURE RENNERFELT.

lVitnesses:

V. II. LUDVIGSSON, F. W. CARLBAUM. 

